Sunstone and Tantalite Optical Properties

Sunstone

Tantalite

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Optical Properties

Luster

Vitreous

Resinous

Pleochroism

Weak or absentWalter Schumann

Dispersion

0.010.03

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

TransparentWalter Schumann

Refractive Index

1.53-1.552.190-2.457

1 3.25

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Optic Character

Crystal System

Triclinic

Orthorhombic

Birefringence

0.007-0.0100.083

0 0.296

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Clarity

Transparent to translucent

TransparentWalter Schumann

Sunstone and Tantalite Optic Character

Sunstone and Tantalite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sunstone and Tantalite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Sunstone and Tantalite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

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Sunstone and Tantalite Transparency

Similar to their colors, Sunstone and Tantalite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Sunstone is Transparent, Translucent and Transparent to translucent while Sunstone is Transparent, Translucent and Transparent to translucent in appearance.